package org.javaniu.encryptanddecrypt;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.NoSuchAlgorithmException;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.SecureRandom;

/**
 * 生成公私钥对文件。
 * @author javaniu_飞翔
 */
public class GenerateKeyPair {

	/**
	 * @param args
	 */
	public static void main(String[] args) throws NoSuchAlgorithmException, IOException {
		
		generateKeyPairFile();
		
		

	}

	private static void generateKeyPairFile() throws NoSuchAlgorithmException,
			FileNotFoundException, IOException {
		/* 生成秘钥�?*/
		KeyPairGenerator generator = KeyPairGenerator.getInstance("RSA");
		generator.initialize(1024, new SecureRandom());
		KeyPair keyPair = generator.generateKeyPair();
		
		/* 生成公钥文件 */
		PublicKey publicKey = keyPair.getPublic();
		byte[] pub = new byte[]{};
		
		pub = publicKey.getEncoded();
		FileOutputStream outPub = new FileOutputStream("d:\\PublicKey");
		outPub.write(pub);
		outPub.close();
		
		/* 生成私钥文件 */
		PrivateKey pirvateKey = keyPair.getPrivate();
		byte[] pri = new byte[]{};
		
		pri = pirvateKey.getEncoded();
		FileOutputStream outPri = new FileOutputStream("d:\\PrivateKey");
		outPri.write(pri);
		outPri.close();
	}

}